Demountable sheave bearing



Dec. 30, 1930. s. H. H. PARSONS 1,786,741

DEMOUNTABLE SHEAVE BEARING Filed July 27, 1929 2 Sheets-Sheet 1 l8 i a ,3 l l I l x?? l a m a w I -zq '21 4-5 I be I A ll INVENTOR.

syluanus H. H. Parsons W ffimNm s.

Dec. 30, 1930. s, PARSONS 1,786,741

DENOUNTABLE SHEAVE BEARING Filed July 2'7, 1929 2 Sheets-Sheet 2 n V V J 5 'INVENTOR.

Sylvanus H. H. Persons Patented Dec. .30, 1939 SCI-IALK, or rouenxnnrsrn, new. YORK DEMOUNTABLE snnevn Erasmus Application filed 11113 27, 1929. Seriaino. 3215454.

This invention relates to a demountable sheave bearing of that class, where it is desirable to be able to remove both the sheave wheel and the pin or shaft on which it is mounted without having access to either side of the housing or block within which the sheave wheel ismounted, this being especially important in the use of sheave wheels for steering gears in marine work where the blocks have to be mounted between decks, against bulkheads etc, where it is impossi- 'ble to gain access to either side of the block without demounting the same. I

The object of the invention is to provide novel construction, whereby the bearing within which is mounted the shaft carrying the sheave wheel may be removed from the block without access to either side thereof.

Further, that the block may be mounted in a permanent manner with either or both of its sides in close proximity to a bulkhead or deck. I I

Still another object being that by this style of bearingthe shaft may be made to float in ball or roller bearings which are removable as a unit for the purpose of removing the sheave or-to renew the parts, and also by this construction shafts of difl'erent sizes may be interchanged in the same housing or block by the substitution of bearing blocks of different bores.

lVith these and other objects in view my'invention consists in certain novel construction and combination of parts as will hereinafter be fully described and claimed, and fully illustrated in the accompanying drawings in which like figures of reference refer to corresponding parts inall of the views, but it is-understood that slight changes may be made without departing from the spirit of the invention. p p

In the drawings Figure 1 is a top planview of a sheave block mounted in: close proximity between. two walls or decks, where it is impossible to have access to either side of the block or hous one wall removed.

Figure' 3 is an enlarged detailfsectional viewv showing the construction of'the device.

Figurevis a side elevation of the same, taken on the line A'A of Figure 3.

. Figure 5 shows a modified form of bearing block. a

Figure 6 shows bearing block;

another modified form of Figure 7 show s anenlarged front elevation of a modified-form of bearing housing or mounting i Figure Sfalso block or housing.

' Referring to the drawings InFigures 1, 2, 3'a1'1d 4, the usual form of'housing or block .10 is shown which compjrises a casting ,formed iwith an'attaching base-and two parallel uprights 11, but in place of said uprights-being formed with; aline'dbearmgifor the sheavepinorshaft 12, they:

shows a modified form of or fi I sYLvANUs n. H. PARSONS, or ooscoB, connnorrourfassrsnon.ro aeco anurrnnr are provided with removable bearing blocks v 13- which are mounted in the uprights in some suitable manner, such as shown in the above .figures, which comprises forming the inner sides of the uprights 11 with'longitudi- 'n'al slots 14 within which is mounted a bearmg block 13 formed either with a plain bear-v ing or a roller or ball bearing lG, within which the shaft 12 carrying thesheavewheel'17:is

mounted. 1

These bearingblocks 13 may be secured within the slotslein any suitable manner. suchas the bolts 18 which are threaded into theierldsof the uprights 11 and passed through grooves formed in the sides of the bearing blocks 15, thus holding them in place from all side strain or pull by the sheave, but allowing them to be removed by removing said bolts and sliding the bearing blocks 13,

bearings 16and shaft 12 out as one unit, and

without access to either side of the housing. It will thus be seen that by this construction that theshaft 12 may float; that is it does 7 not have to be secured in the sheave wheel 17 as it has no side movement as its ends abut v p Y the bottoms of the slots 14 in the uprights.

. Now taking themodifiedform shown in- Figure .5, the slots 19 formed in the uprights the bearing blocks 20 are tapered to correspond, so that the housing 10 may be so mounted that the pull on the sheave wheel will tend to tighten the tapered bearing blocks in the housing, and no securing bolts will be required. 7

Also as shown in Figure 6, while the slots 14 in the uprights 11 may have parallel sides as in Figures 1, 2, 3 and 4i, the bearingblocks 21 are formed on one of their ends with a flange or head 22 which engages the side of the upright 11 holding said bearing blocks from removal except in one direction; this construction also not requiring any securing bolt.

Now taking the construction shown in Figures 7 and 8, in many cases the housings are madefrom sheet metal, which is bent to form attaching flanges 23 and uprights 2 L as in Figure 7, or an attaching base 25 and uprights 26 as shown in Figure 8. 7

As shown in Figure 7, the uprights 24 are bent or formed to provide the channel sections 27 within which the bearing blocks 28 may be secured by the pins 29 passed therethrough and through said channels; and in Figure 8 the uprights 26 may be provided with angle pieces 30 secured thereto by rivets 31, to form supports within which may be secured the bearing blocks 28 by the pins 32. Or the bearing blocks may be secured in the uprights by any suitable means such asset screws, etc. that are inserted from the ends 3;; of the uprights, so that access to the sides of the housing is not required.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is 2- A demountable bearing for sheave blocks, comprising in combination with a housing having parallel sides formed with slots in their adjacent faces, of bearing blocks formed with alined bearings and adapted to be H mounted within said slots, and retaining means for said blocks comprising bolts engaging both said blocks and the sides of the housing.

In testimony whereof I afiix my signature.

SYLVANUS H. H. PARSONS. 

